Brook



(No Medal.)

H. G. T. GLAZEBROOK.

' WRENCH. No. 387,873. Patented Aug. 14, 1888.

avwe'wbo a I 334 mmm/l (M 3 00*- UNITED STATES PATENT rricn.

WRENCH,

SPECIFICATION forming part of Letters Patent No, 387,873, dated August14-, 1888.

Application filed September 20, 1886. Serial No. 213,983. (No model.)

To all whom it may concern.-

Be it known that I, HENRY G. T. GLAZE- BROOK, a subject of the Queen ofGreat Britain, residing at Simcoe, in the county of Nor- 5 folk,Province of Ontario, Canada, have invented a new and useful Improvementin Sliding'Jaw Wrenches, of which the following is so full, clear, andexact adescription as will enable others skilled in the art to which myinvention appertains to make and use the same, reference being had tothe accompanying drawing, in which I show a longitudinal section of awrench embodying my improvement.

The object of this invention is to construct a wrench which may bequickly and easily adjusted to nuts of varying sizes with the greatestdegree of certainty in the shortest possible time with the least expenseof phys ical force. I

In the accompanying drawing, the permanent jaw A is rigidly secured to astraight smooth rectangular handle, B. A hollow perforated jaw, O, ismounted on the handle B, which handle extendsthrough the perforation Din the slidingjaw. lVithin the hollow slid ing jaw G is located atriangular-shaped cam, E, having a cutting edge, e, which abuts againstthe handle B, and which is adapted to embed itself into the metal of thehandle sufficiently to hold the sliding jaw against movement away fromthe permanent jaw A while the wrench is being used to operate a nut. Theinclined face a of the cam E abuts against a stop, I), which has atendency to wedge the camsnugly in between the stop I) and the bandle Bin such a manner that all movement of the sliding jaw away from thepermanent jaw is prevented until the cam is released by the operation ofthe rod F, which rod is provided at its outer end with a finger-loop, G,and at its inner end with a smaller loop, which engages with a staple,h, on theinner end of the cam E, thus securing the rod F and the cam Epivotally together at this point. A coiled spring, H, encircles the rodF, and abuts against the cam at one end and against the end of thesliding jaw at the opposite end in such a manner as to keep the cam Enormally into contact with the stop 6 and the side of the handle B. Asecond stop, d, limits the movement of the cam E away from the stop b.The rod F extends through'a perforation,

I, in the hollow sliding jaw G.

From the foregoing it will be readily understood that the positive andinstantaneous V adjustment of the wrench can be effected as follows: Thefinger of the operator may he slipped through the loop G and the slidingjaw moved to any point away from the rigid jaw A, and when the slidingjaw is adjusted to the desired point on the handle B the rod F isreleased, when the force of the spring H will, by its own resiliency,cause the cam E to rest snugly in between the stop I) and the handle B,where it will hold the sliding jaw until the cam is released by theoperation of the rod F. All pressure of any not or bolt against thegripping-surface of the sliding jaw G will simply have the effect ofembedding the cutting-edge e of the cam E more deeply into the metal ofthe handle B; but the sliding jaw will remain firmly in place untilreleased, as heretofore explained. When it is desired to release theslidingjaw, the finger of the operator is again inserted into thefinger-loop G, the rod F is pulled with sufficient force to overcome theresilient force of the spring H, and the cam is pulled back until itstrikes the stop Z), when the sliding jaw will be free to be moved toany desired point on the handle B.

Having now described my invention, what I believe to be new, and desireto secure by Letters Patent and what I therefore claim, is

In a wrench, a hollow perforated sliding jaw provided with a movable camtriangular in outline and having one cutting-edge and confined withinpredetermined limits entirely within the sliding jaw by stops b and d,and also having a rod provided with a circular loop at its outer end andpivotally secured to said cam at its inner end, and a coiled springencircling said rod and keeping the cam normally in contact with thehandle, in combination with a straight smooth handle which extendsthrough the perforated jaw and has a rigid j aw secured thereto, allconstructed and combined to operate substantially as and for thepurposes specified.

Dated at Simcoe, Ontario, this 21st day of July, A. D. 1886.

H. G. T. GLAZEBROOK.

In presence of J. H. ANsLnY, G. E. JACKSON.

